The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 1979
Filed:
Feb. 09, 1978
Applicant:
Inventor:
Henry E Todd, Cedarburg, WI (US);
Assignee:
Pratt Manufacturing Corp., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65B / ; B65B / ; B65B / ; B65B / ;
U.S. Cl.
CPC ...
53545 ; 53329 ; 53373 ; 1565831 ;
Abstract
A machine for heat sealing articles between two continuous webs of plastic material comprises two parallel synchronously driven shafts, each of which has a pair of wheels on it which are brought into pressure relationship for heat sealing. One shaft is mounted for yielding perpendicularly to its rotational axis and carries a cam follower disc. The follower disc is raised intermittently and the seal wheels are thereby separated, to relieve pressure and omit sealing, with a cam that is on the other shaft and is engaged periodically for rotation by means of a clutch.